Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Validation of Low-Cost Pavement Monitoring Inertial Sensor for Urban Road Network

Version 1 : Received: 31 March 2021 / Approved: 1 April 2021 / Online: 1 April 2021 (11:38:37 CEST)

A peer-reviewed article of this Preprint also exists.

Loprencipe, G.; de Almeida Filho, F.G.V.; de Oliveira, R.H.; Bruno, S. Validation of a Low-Cost Pavement Monitoring Inertial-Based System for Urban Road Networks. Sensors 2021, 21, 3127. Loprencipe, G.; de Almeida Filho, F.G.V.; de Oliveira, R.H.; Bruno, S. Validation of a Low-Cost Pavement Monitoring Inertial-Based System for Urban Road Networks. Sensors 2021, 21, 3127.

Journal reference: Sensors 2021, 21, 3127
DOI: 10.3390/s21093127

Abstract

Road networks are monitored to evaluate their decay level and the performances regarding ride comfort, vehicle rolling noise, fuel consumption, etc. In this study, an Inertial Measurement Unit is proposed by using a low-cost three-axis Micro-Electro-Mechanical Systems accelerometer and a GPS instrument, which are connected to a Raspberry Pi Zero W board and embedded inside a vehicle to monitor indirectly the road condition. To assess the level of pavement decay, the comfort index awz defined by the ISO 2631 standard was considered. Considering 21 km of roads, with different levels of pavement decay, validation measures made using the proposed IMU, another pre-assembled IMU, and a Road Surface Profiler were performed. Therefore, comparisons between awz determined with accelerations measured on the two different IMU are made; in addition, also correlations between awz, International Roughness Index (IRI), and Ride Number (RN) were performed. The results were shown very good correlations between the awz calculated with the proposed IMU and ones in the other IMU. In addition, the correlations between awz and IRI and RN were showed promising results, considering the use and the costs of the proposed IMU as a reliable method to assess the pavements decay in road networks where the use of traditional systems is difficult and/or not cheap.

Keywords

Pavement Monitoring; Inertial Measurement Unit; Urban Road; International Roughness Index; Ride Number; Ride Comfort.

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